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A258290 as a simple table

na(n)
00
11
25
324
459
5456
61448
76868
819749
969364
10236356
111526956
123717440
1322858340
14122553540
15474051984
16954720543
175726109024
1819329586520
1992051285020
20319059863484
211271796704788
224829219746964
2329791326914640
2474372011398840
25340296661452300

[0,1,5,24,59,456,1448,6868,19749,69364,236356,
 1526956,3717440,22858340,122553540,474051984,
 954720543,5726109024,19329586520,92051285020,
 319059863484,1271796704788,4829219746964,
 29791326914640,74372011398840,340296661452300]